Internal-combustion engines – Multiple cylinder – Having rotary output shaft parallel to cylinders
Reexamination Certificate
2000-08-07
2001-10-23
Kamen, Noah P. (Department: 3747)
Internal-combustion engines
Multiple cylinder
Having rotary output shaft parallel to cylinders
C123S056800
Reexamination Certificate
active
06305335
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention is concerned with internal combustion engines, particularly two stroke diesel cycle engines of the type having a barrel arrangement of cylinders with opposed pistons and using dual cams to convert linear piston movement to rotational movement of a central power shaft. While this general type of engine is well known, the present invention provides improvements and advantages that have not been attained heretofore.
BRIEF DESCRIPTION OF THE INVENTION
A principal object of the invention is to provide a compact light weight two stroke internal combustion engine, particularly an engine using the diesel cycle, that can serve as a static or propulsive power plant and that is friendly to the environment.
In a preferred embodiment, a barrel arrangement of cylinders (like a revolver gun) serves as a main structural component of the engine, the cylinders being attached to and extending through transverse diaphragms that support a central power shaft rotationally and that are attached at their perimeters to a shell or casing forming an engine enclosure. Dual opposed cams at opposite ends of the cylinders convert linear movement of the pistons to rotational movement of the power shaft. The cams preferably have a “bicycle wheel” construction in which a hub on the power shaft is connected to a configured rim by a plurality of spokes.
In a preferred embodiment of the invention, inlet ports of the cylinders are opened toward the end of a power stroke, to admit high pressure air before exhaust ports are opened, in order to promote more complete combustion and efficient exhaust gas scavenging. Heat exchangers use the exhaust gas to preheat the high pressure air admitted to the cylinders.
Also, in a preferred embodiment, special fuel injectors are used that cause fuel jets to intersect and thereby to provide better fuel atomization, turbulence, and combustion.
Further in accordance with a preferred embodiment, special ignitors are used that combine a glow plug and a spark plug.
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patent: 5507253 (1996-04-01), Lowi, Jr.
patent: 5551383 (1996-09-01), Novotny
patent: 5799629 (1998-09-01), Lowi, Jr.
Kamen Noah P.
Miles & Stockbridge P.C.
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